I (like plenty of folk on here) flit between bikes and I really notice the difference in speed, weight and how the bike handles. That’s all part of the fun for me.
My gravel/cx bike is pretty quick and light but my xc bike is no slouch either. My Hello Dave is so different to my other bikes (or any bike I’ve owned or ridden) that it can feel like a big energy sapping lump at times. I still love it though as it’s so bloody capable and allows me to ride trails – that scare the life out me – in relative safety.
Maybe I’m just trying to say is that bikes are awesome and it’s fun trying different ones.