I agree with many others. Clash feels more proportional on your finger.
If you still love the Tiffany, would you try the band in a bigger size? I believe what you're trying on is the narrow version? (though I'm not sure, I have not looked at Tiffany jewelry in a while)
I like the exact T1 ring but never gotten to buying it. With the recent price increase in my country I am more unlikely to buy it. The clash looks good on you!