Of the first 6 presented I prefer the composition of 3 & 4. It is a bit more dynamic to me.

I am guessing that the old character of the tram car is what captured your attention, and it for this reason I don't like seeing the adverting on the side. It detracts from the "old world" feel for me, which is another reason I prefer 3 & 4 where it isn't quite as obvious.

Now, I like the idea of the B & W better, but I find the processing too dark to my tastes. (I have noticed this with quite a few of your B & W conversions, so maybe that is your personal preference, or maybe even monitor set up??). I suspect you have made it darker due to the bright green in the trees and in front of the tram. I think it would be better to address this with some local burning rather than a global exposure adjustment. I would also reduce the brightness of the centre front window at the same time.

Someone (MBrager perhaps??) mentioned in another thread of yours about Silver Efex Pro. I love that program for B & W conversion and will echo the previous comment about suggesting you check it out if you haven't already.

I like what you have done with the final shot (particularly the recovery of the bright roof), but again find it a tad dark for my tastes.