Are CAT6 RJ45s supposed to be physically different from their CAT5 counterparts? I've bought some CAT6 RJ45s to match my cables and feel like I'm hallucinating because they don't fit into the Ethernet port. I've looked around in local tech stores, bought online and see all the CAT6 RJ45s are the same everywhere else, but when I use a CAT5 RJ45 it actually fits into the Ethernet port in literally anywhere. Crimping is suddenly exponentially harder with CAT6 RJ45s too for some reason too and after years of practicing crimping I feel like it's a skill issue at this point. I even searched up just to be sure but while answers say they're the same my eyes and fingers are feeling the difference. What's going on? What am I doing wrong? I'm now doubting whether CAT6 RJ45s are even supposed to fit in my Ethernet ports at home.

Update: The answer really was the crimper all along... until I get a CAT6 crimper I guess I'll just crimp harder for now - now everything fits, 1 year and 2000 jacks later, how embarrassing...

Thanks very much, everyone!

Post-update: So the cable worked at 3am... only to crap out at 10am - apparently both my test cables are bad in the same wires (3-6) because as the ISP service guy says, "it could've broken on the inside since the shielding's so soft". They rewired everything and now everything's fine, I guess...