Oh plz!!! As an Xcelsior fan, the combination in that 2014-15 XD40s batch are so much better for less pollution and it felt like a race car. I know many officials despise them due to how quiet they are. The 4800s combinations are excellent too, but some slight features I dislike(e.g. half pane rear doors). Yes, the 2 units out of the 4830s range you've mentioned are powerful, I rode them before. I still love the the recent XD40s(2018-19) alot better than 2011,2014-15 XD40s. They are so robotic in their performance. My very first unit of them I rode was #7623(FB unit, B46 +SBS) in May 23, 2018, it was amazing. In December 2018, I also have operated my first 2 recent XD40s(after they were just delivered in MJQ) which were #7573 and #7585. When I acelerated them, the speed was swift and fiesty as I wanted and each time I did that(I had them NIS) was around 7 - 8a.m. along 12th ave(Manhattan). With #1073, it should be the most popular unit with the XN60s.
I already know the 2014-15 XD40s(my favorite Xcelsiors) are your wost favorites as you have mention in my topic..."Which buses of NYCT/MaBSTOA is more popular ?"