I'm a hobby woodworker. I had a B&Q PowerPro router (stop laughing those who know what I'm talking about

) It's dust collection wasn't that bad if you were using it with the base fully on the work piece, had a decent vac and didn't go too fast. The motor failed on that router.
I then bought an OF1400 (already had a TS75 at that point). I would say the dust collection for using it fully on a flat surface is about the same. If you're using spiral upcut bits the dust is ejected upwards into the vacuum stream, if you're using straight bits it's ejected backwards through the cut so you still get covered in dust.
The different thing about the OF1400 compared to my old router is the ability to use a small plastic cover underneath the base that covers flush trim bits and captures a lot of the dust. There's also a dust "chute" that goes on the parallel edge guide, but I find it pointless and does nothing - theres a tiny gap where the chute clips into the parellel guide and the dust gets out through there.
The OF1400 has good dust collection IF you use it trying to collect the dust, i.e. use upcut bits and add use the dust shroud with flush trim bits. You'll also need a vacuum / dust extractor.
Please be aware the OF1400 has handles that are "high up" they're not attached to the base. I find it very easy to tip the router when I'm using it, but I am a hobby woodworker and probably need to improve my skill at using the thing!
Regards
Bob