but the 3010B (which i am assuming is what you are talking about) is more comparable to the PL8, the 306B is similar to the PL6, so thats not really a fair comparison. going through buddyrc.com, here are the prices:
PL6 = $175
306B = $160
PL8 = $199
3010B = $190
I think for 99% of people in the hobby, especially in 3D, there is no need for the PL8 or 3010B. the reason a lot of people have them, myself included, is the fact that they came out first. once the two companies saw how everyone was using them, they came out with the PL6 and 306B. anything above 6s people tend to run 2 batteries in series, so there is no need to be able to charge any higher than a 6s pack. so take it for what it is worth, but i truly believe that the next thing in chargers is like the 4010duo, basically two 1000w chargers in one, with two ports for charging. its a convenience thing, not a performance thing. luckily i have the power supply to run it pretty hard (not to its ability), but a lot of people dont. My 24v 2400w setup is nice, but it cost a pretty penny. i can only imagine what a 50v ps would cost