Brymen's price is what makes it an interesting proposition, even though you have to order it from overseas if you live in the US, as the Greenly equivalent is more expensive, although you do get lifetime warranty with Greenly like you do with a new Fluke. On the other hand, there are great deals on 87V on ebay you can snatch all the time if you look around, since it's a much more popular meter. There are tons of Flukes on Ebay.
87V's feature set includes some must haves for me that BM lacks, auto hold is a big one (I use it often, even on your bench it's handy to be able to refer to the last reading while you're going through a service manual for the thing you're trying to troubleshoot), fast latched continuity (could probably live with scratchy continuity but that feels like using a $10 meter), Fluke is also smaller (more room on the bench), 400 battery life vs 100 on BM..
Few other things, 87V is better at: transient peak performance, you can test Zener diodes with Fluke with 7.9V voltage instead of 3.5, can withstand higher humidity. There are also small things like being able to center the bar graph, some other nifty power on features. Reputation to take abuse and perform in spec for decades.
Aside from the AC defaulting in the current measurement mode (there's a safety argument for this), Fluke is great to use ergonomically, and everything makes logical sense. For instance if you're measuring in min/max mode, the auto power off is disabled. It's the little things like these where you realize it's a well thought out product.
I own a 27/FM but the 87V is a notch above in build quality imo (not ruggedness). What I mean by that is that 87V just feels like it was made of better material. The dial is the best dial I've ever used.
The biggest feature BM offers imo is resolution. But I find myself rarely even taking the advantage of 20K resolution mode on my 87s (I have a 5 1/2 digit bench meter which I rarely use.), whereas I couldn't live without auto hold. So when I considered getting a BM869s I got a 2nd 87V instead.
But bottom line is if none of the features are a deal breaker for you: If you live in the US and have a limited budget and don't mind a 2nd hand ebay meter, there is very little reason to get a BM. As you can often score an 87V for less. If you want new and cheap, especially if you live outside of US, there are good reasons to go with Brymen. But if you want a good quality meter that will serve you for decades, you can't go wrong with an 87V.