Both are made in USA, both have "lifetime" warranty (which really means until the product is discontinued plus a few years -- forgot the exact details, but look them up). Both have quality input protection, fast autoranging, fast latching continuity beep, bar graph. Both are rugged meters which will perform to specifications very well, even after being dropped and subject to mishandling.
87-V has up to 20000 counts, vs 6000 for 179, but download the manual and look at it for how the 20000 count option works -- it's not always on. 87-V also has a bit better basic DC accuracy. 87-V has the low pass filter for motor drive applications. 87-V has microamps. It also has duty cycle. 87-V has conductance, which is the inverse of resistance. With the 179, you can measure resistance, put it into a calculator, and hit the 1/x button.
Most of the time, both meters will do the job equally well, but there are definitely some extra features in the 87-V. Worthwhile? Maybe. I can't think of anything the 179 does better than the 87-V.
I have the 179, and am very happy with it, but if I were doing it over, I just might spring for the 87-V.