Of course different make of tyres will feel different. Run Armadillos 23's then 25's for example . You won't notice the difference.I swapped the stock Hutchinson 23mm tyres on my Triban for 25mm Specialized Armodillos and the difference is enormous. The 25mm is much more comfortable. I always thought that the increase in comfort was purely due to the larger size only. I could be wrong and it is a result of the change in tyre manufacture.