Between Solido/Verem/Tank Museum and Blitzkrieg I would definitely choose the latter.
I started out with Solido/Verem/Tank Museum models for 28mm WWII skirmish gaming back in the days of Easy Eight's Battleground WWII when they were the "only game in town," but have since moved on to better things because compared to newer alternatives available in 1:48/1:50 their detail and accuracy are no longer good enough. Another thing I never liked is their oversized chunky metal tracks, and many of the Solido models are actually 1:43.
Today, my tank and vehicle collection consists entirely of 1:48 plastic or resin kits (Tamiya, Hobby Boss, AFV Club, Skybow, Bronco, Blitzkrieg, Ken Swenson models) and a few pre-built and repainted 1:48 or 1:50 diecasts (Hobby Master, 21st Century/Classic Armor Diecast, Corgi).
While the selection and quality of 1:56 is unmatched, to me they just don't look right with my heroic 28mm figure collection comprising mostly of Artisan Designs and Crusader minis.
And only go with Gaso.Line if they're not Solido conversions. You can tell whether they are or not by looking at the tracks. If they have the chunky metal tracks then they're Solido conversions.