Germans have better and more efficient repair options.
Better vet than IS-2 outright.
1-Regarding repair options, i'll say CE are better suit for the job in the late game in contrast to Pio due to price. Out of the 2 commanders with IS2, theres one which let you autorepair. So unless we are talking about support from other commanders or factions (OKW), SU is in a better state.
2-Just in case people wonder: capture point vs Blitz and (IS2) +50% weapon rotation speed vs (Tiger) -20% scatter
They both get range but is worded differently. IS2 get's 25% extra range while Tiger gets plain +10.
3-I'll add that i'm 95% sure that Tiger has better MG on the tanks but the gunner upgrade is worst in comparison to the IS2 (although prices are also different). Gunner DPS difference is HUGE btw.
There you go, complete comparison