TAG Heuer Connected Calibre E5 vs Montblanc Summit 3
TAG Heuer Connected Calibre E5 (#2, best premium) vs Montblanc Summit 3 (#4, best value): in our Luxury & Style scoring the TAG Heuer Connected Calibre E5 totals 9.1/10 and the Montblanc Summit 3 8.6/10. At $2,450 versus $1,035, the Montblanc Summit 3 costs $1,415 less.
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TopsFive comparison scores
Side by side
How they differ in real use
Built from our luxury style smartwatches scoring, each product's published specifications, and verified owner feedback — not hands-on testing.
Both the TAG Heuer Connected Calibre E5 and the Montblanc Summit 3 made our Top 5 Luxury & Style, at #2 (best premium) and #4 (best value). Swiss luxury watchmaking heritage since 1860 meets modern technology. Only major Swiss brand committed to smartwatches. Grade 2 Titanium, domed sapphire, ceramic bezel. Fine Swiss watchmaking heritage from Montblanc's 120+ years in a 42mm titanium smartwatch easily mistaken for classical analog. Entry point to luxury smartwatch at $1,035.
We score luxury & style on Materials (30%), Design & Craftsmanship (30%), Brand Heritage (20%), Features (10%) and Value (10%). On that basis the TAG Heuer Connected Calibre E5 totals 9.1 out of 10 and the Montblanc Summit 3 8.6. The widest gap is Materials, where the TAG Heuer Connected Calibre E5 scores 10 against 9 for the Montblanc Summit 3: titanium, sapphire, ceramics. Design & Craftsmanship also separates them: 10 for the TAG Heuer Connected Calibre E5 versus 9 for the Montblanc Summit 3. The Montblanc Summit 3 claws back ground on Value.
On paper, the specifications that actually differ: Display: 1.39" OLED on the TAG Heuer Connected Calibre E5 versus 1.28" AMOLED on the Montblanc Summit 3; Case: Grade 2 Titanium on the TAG Heuer Connected Calibre E5 versus Titanium, 42mm on the Montblanc Summit 3. They match on OS.
Pricing as of September 30, 2026: $2,450 for the TAG Heuer Connected Calibre E5 and $1,035 for the Montblanc Summit 3, a $1,415 difference in the Montblanc Summit 3's favor. Owners praise the TAG Heuer Connected Calibre E5 for swiss watchmaking heritage and grade 2 Titanium case; the most common complaint is very expensive. Owners praise the Montblanc Summit 3 for 120+ years brand heritage and 42mm titanium case; the most common complaint is dated Snapdragon chip.
TAG Heuer Connected Calibre E5
- Swiss watchmaking heritage
- Grade 2 Titanium case
- Domed sapphire crystal
- Ceramic bezel
- Very expensive
- Limited smart features vs competitors
- Short battery life
Montblanc Summit 3
- 120+ years brand heritage
- 42mm titanium case
- Classical analog aesthetics
- Entry luxury price point
- Dated Snapdragon chip
- Short battery life
- Limited sports features
Which should you buy?
The TAG Heuer Connected Calibre E5 is the better fit for swiss watch enthusiasts and luxury tech collectors; it is the higher-scoring pick here, chiefly for Materials and Design & Craftsmanship. The Montblanc Summit 3 is the better fit for montblanc brand enthusiasts and classical watch aesthetics, and the stronger choice if Value matters more to you than the overall score. If the $1,415 saving matters more than Materials, the Montblanc Summit 3 is the better value. The TAG Heuer Connected Calibre E5 is a poor fit for feature-focused buyers; the Montblanc Summit 3 is a poor fit for sports/fitness focus.
Choose the TAG Heuer Connected Calibre E5 if
- Swiss watch enthusiasts
- Luxury tech collectors
- TAG Heuer brand loyalists
Skip it if
- Feature-focused buyers
- Budget shoppers
Choose the Montblanc Summit 3 if
- Montblanc brand enthusiasts
- Classical watch aesthetics
- Entry luxury smartwatch
Skip it if
- Sports/fitness focus
- Long battery needs
Common questions
Is the TAG Heuer Connected Calibre E5 better than the Montblanc Summit 3?
In our Luxury & Style ranking the TAG Heuer Connected Calibre E5 scores higher overall, 9.1 to 8.6, with the biggest advantage in Materials. The Montblanc Summit 3 is stronger on Value, so it is the better pick if that matters most to you.
How much more does the TAG Heuer Connected Calibre E5 cost than the Montblanc Summit 3?
$1,415 more as of September 30, 2026: $2,450 for the TAG Heuer Connected Calibre E5 against $1,035 for the Montblanc Summit 3. Prices move, so the merchant page shows the current figure. What the extra buys is mostly Materials: 10 versus 9 in our scoring.
What is the main difference between the TAG Heuer Connected Calibre E5 and the Montblanc Summit 3?
The headline spec difference is Display: 1.39" OLED on the TAG Heuer Connected Calibre E5 versus 1.28" AMOLED on the Montblanc Summit 3. In use, the gap that matters most is Materials (10 vs 9 in our scoring): titanium, sapphire, ceramics.