Out of curiosity, I went and tested this, using S-Mines (40 damage) as a unit of measurement. 1 S-Mine took out half of the Osttruppen's health, which means they do indeed have 80. Same for the Grenadier and the Partisan.
It might just feels like they die faster because their rifles do 8 damage instead of 16, so when you get a hit it ticks off a very small part of their health bar, but when they hit you, it's a much larger chunk removed.
Well, mines aren't the best source to test this. You can hit just one model with them or you can hit 3 models, you can't reliably determine who got hit and who got not, cons for example will loose half hp of s-mine only if they are bunching up, usually it takes 3-4 of them to squad wipe, 2 are quite rare.
I've based my assumption on the portion of health they are getting lost after being hit by a con rifle and to me it seems like their health loss is more on the level of gren health bar loss, then actual con, which they are supposed to have same effective HP.
Regarding DPS, they are apparently supposed to have around 11 DPS as a squad, while cons have 17.
At long range they are supposed to have around 3.8 while cons around 4.5.
So while there is a difference, it just doesn't feel right.