Ok, Chinese so they *could* be of indifferent quality, but either should do the job. If you can, get 'em to email you the installation guide before you buy, the quality of info makes a big difference at setup time!
Both use a braking resistor rather than a chopper, check out what resistance and power rating they need - generally the lower the resistance the higher the power and the more braking you can configure - proper *emergency* stops need a high peak power rating, repeated fast "routine" stops need a high average power... As an example, on the ABB VFD I use, a 100 Ohm 1kw resistor does a fine job, for instance a nearish instant stop (a few turns of a hefty all-steel 10" 4-jaw at 200 - 300 rpm, handy when fwd-rev cutting metric threads on an imperial lathe, seemingly instant with collets and a small workpiece -YMMV), repeatedly. The resistor was under £30 including shipping from China... The VFD cost less than that, but was a bit of a lucky break!
Dave H. (the other one)
why do I need an emergency stop Dave?? I have a foot brake on the lathe. It instantly disconnects the clutch and bang it stops .
I might have unearthed a mine field. http://www.practicalmachinist.com/vb/general/colchester-master-2500-electromagnetic-brake-188665/
Oh this could get complicated.
Regards Andy T