TBH, I am mostly an Xcelsior fan.
My Xcelsior ranks....
1. NFI XE60s and XDE60s(wish to come to MTA)
2. NFI XN60s
3. 2018-2019 NFI XD60s
4. 2017 -19 NFI XD40s
5. 2017 NFI XD60s
6. 2017 NFI XN40s
7. 2015 - 16 NFI XD60s
8. 2014 - 2015 XD40s
9. 2012-13 NFI XD60s
10. 2011- 12 NFI XD40s
Though the XDE60s may have the auto engine pause feature for less emission and less annoyance of idling vibration, it can tie with my excellent taste to win with the XDE40s as their co - workers. Plus XE60s are winners over the XDEs with strictly electric source and no maintenaince recommendations, but they are still here for inspections. The XN60s are toughest and powerful ones, especially with a heavy duty backfire I adore. The recent XD60s have my great taste with the 2018-19 XD40s by the all time inside and outside announcements and the best, Cummins L9(like the XN60s, but has the Near Zero rate as much better than the regular Cummins L9). Back in 2017, the XN40s didn't have the XN60s yet so I had the XD60s win over them along with the 2015-17 XD60s. But the XN40s are tough and quiet like their recent rulers(XN60s). The 2014-15 XD40s were my first favorites due to their destination signs, the sweet air conditions, and the engine was quiet as I expected. Plus their rear doors are in full panes that best matches their designs. I still like the 2012-13 XD60s, but I never rode them and I am waiting for them to run out of Grand Ave and East New York. I like the 2011-12(4800s) XD40s, but are my least favorites because of the loudest engine it has and the rear doors are less appealing for it's body design(but has a smart reminder of the older buses that are likeable for every one).
In my YT channel, the explanations will be shown my bus reviews(like this) and followed by other Xcelsior reviews in this channel...