I put on the Fenders. I'm not detecting a huge difference between the 45-100 Fenders and 40-100 Dunlops. Neither of them has a super resistant feel to me. It's been a while since I've tried the Dunlops on a long-scale bass. The Fender may stay put a little better, so they may feel a touch tighter, or it may be that my technique has improved.
Dunlops are unique strings. They're my favorite on my Mustang, but I prefer them when they're new. They have this clicky vibe that really appeals to me. I'm not so fond of their broken in/aged sound, although I know some flatwound freaks who really go for it. If find that a set lasts me 5-6 months. The 40-100 ones feel lively for a bit longer than the heavier ones. Once fully broken in, their thud is exceptionally thuddy. A bit too much for me.
With GHS and the Fender/Chromes/Ernie Ball-type strings (they seem to sound a bit different from each other but feel pretty similar), I've never really felt the need to replace them unless I've damaged a string, but my favorite sound of all is newish Dunlops.