I feel that all the m60 variants are both overtired and placed in such a way that doesn’t allow for a competitive lineup
The first M60, the unstabilized variant, at br 8.0 it has nothing to stand on. The gun is average at best and underperforms compared to contemporary’s, the armor while decent has glaring weak spots for the few guns that at that tier don’t have a apfsds rounds to easily penetrate it, and the lack of a stabilized gun makes it horrible for any kind of offensive action as in most cases you will see 8.3 and higher lineups which all have stabilizers
The M60 (AOS) carry’s over all those problems being a 8.3 a .3 increase from the previous tank only fixing the issue of stabilization allowing it to perform but just barely. Looking at its Russian contemporary the t-55a which holds advantage over every aspect except armor at least conceptually. In practice though that armor advantage means nothing as the t-55a has several options to eliminate the armor advantage in its apcbc round which can one shot the cupola weak spot that due to m60’s height is almost always visible or a apfsds round which can penetrate an m60 almost anywhere and with some aiming can do serious damage
The last two m60’s, the M60a1 Rise P and M60A3 TTS I don’t necessarily have the experience too speak on them as well as I have not played them yet but looking from the outside and with experience from the last two the era on both them seems negligible at the 8.7 - 9.0 range and to an extent at 8.0 range. Along with that the apfsds round the two tanks share is not good compared to that of lets say m48a2 G A2 or the Russian tanks. Along with that while I recognize that the TTS does include a lazer rangefinder which possibly might warrant a jump in br, the Rise P brings nothing of a major advantage compared to the AOS.
The last issue I have overall with these is that none of these tanks find themselves in a good lineup aside from the AOS. The base M60 has no lineup aside from a premium tank. The AOS has a few options; the T95E1 is honestly a bad tank at 8.3 aside from its semi-reliable speed and somewhat good frame it brings nothing even the supposed point of the tank the apfsds round is just not that great, The M60A2 is a niche tank that brings some positives but I feel is just not great, The Sheridan and Bradley are both niche tanks that I think are good and actually better options than the AOS. Then the Rise P doesn’t have a lineup at all there is nothing at 8.7 other than itself. And Finally the TTS is just in a br range where you would be better off taking the xm-803 and mbt 70 every single time as they do everything better than the TTS.
Overall I just feel that the M60’s are all in a very bad spot and while they perform it isn’t due to any thing positive within the vehicle but rather the individual’s playing them