It's three gladiators in the same vein guard has seven leman russes.
You'd count the Immolator three times, exorcist twice and the new tank 2+(?) for 7 vehicles total.
T7 or T8 on artillery doesn't matter much. Maybe that allowed them to not bump the price? Or give it LOS shooting? Or it doesn't have the additional armour t8 typically has? Who knows, could even be a typo.
Immos, as transports don't need the datasheets to separate out the variants, because they're immune to Ro3. Exorcists, as heavy support, would definitely benefit from being 2 different cards, because you could take 3 of EACH if you wanted. Now I hate Primaris tank models, so even though I own the dex, I never bothered looking up whether they are heavy or transport.
But let me take a shot at this, assuming we DON'T count variant kits:
Gee, you're right; when I write it without the variants, the Sisters do have the same amount of options... Oh wait, nope, Marines STILL have more than twice as many kits. I suppose the suggestions for Nerfing their mid/short range game are immanent then.
Yes, I understand that the jump cannoness with evicserator is an old build. So was the 3rd edition ignore armour saves from the passion. But if you read what I wrote, I noted that the details changed while the effectiveness of the faction to excel at close range didn't.
Comparing sisters of battle to space marines is odd. The latter have always been presented as a jack of all trades army; kind of comparing two different design paradigms. SoB would be gaining something they never really had before, while marines didn't get their options expanded with their new tanks; attack bikes, predators and land speeders fill the same niche as the new vehicles (which also suck, not helping matters). It's also important to note that marines lost a lot of power with their 9th edition codex; both their melee and their shooting got toned down due to Core and changes to stratagems, special rules and points.
Yes, I see now how Assault Intercessors, Bladeguard, and Outriders didn't improve short and medium range performance and options for Marines at all. Especially since being Jack of all Trades means that while all their units are good, none of them are great, where specialist armies will be great at their "thing" and weaker in areas outside their specializations- which is why Fire Dragons and Dominions kick the crap out of Eradicators... Oh wait, they don't?
(Sorry to be such a rude and snippy poster.... This is B&C... Safe space... Allow me to dial it back)
To be fair, Rets DO kick the crap out of Eradicators, and Sisters are performing well in tournies right now... And if that's the measure of whether or not we're fine, rather than how many options we have, then I guess you're right... We are... Fine... I guess?
But when I look at someone's 5k SM collection, where they've actually built whole companies just as a modelling project, and it looks great because they have 100+ kits to choose from, I wonder what it would look like if I felt like building a Preceptory that includes one or two complete Commanderies with my mere 34 kits.
And I know- flagship faction and all that; people will argue that only Marines could sell 100+ kits, but I've never been sure about that, because I would buy them. I want an Abbess, a Cannoness Superia for each Order, a Cannoness Preceptor, a Cannoness Commander; I want Novitiates, Frateris Militia, Flyers...
And I know I'll never get all of that, or even half of it. But the four units I know I'm getting brings me closer, and quite frankly the suggestion that I need to have my entire army nerfed because I should only be able to have a single unit with a range greater than 36"... well, it got under my skin a bit, so sarcasm happened.
As always... Peace, and Respect.