Looking at the two tank pictures shown above the lower one seems decades ahead of the upper one.
However, some tanks _looked_ quite advanced even though their technology was not. An example is the RSAAs Gazelle light tank for which I used a picture of the Swedish Landsverk L-60B tank (or known from Hungria as Toldi Tank). Without those guys crawling all over the tank she would
look quite advanced regarding her general layout. But actually the L-60 was a very small tank with lots of problems. I only chosed her to have a nice picture at hand. Btw, she looks less modern
here .
The question now is - does RAs tank look advanced only or is it really a design decades ahead of everything else? Even if sloped her armour might be (weakly) rivetted, truely making her a child of the mid-30s (think British Crusader tanks for example). Should her engine tends to overheat and break down, that would be normal for the time being. She´s also much larger and heavier armed than the Toldi which makes me wonder what experience the Italians based this design on. I can´t remember to have seen Italian armoured vehicles in combat but radical designs or major steps forward were (always) based on combat experience etc......
To sum it up - the pic alone doesn´t allow enough insight. She just appears to be advanced and her sloped armour makes her look sort of "fast". Reading about increased range and heavy 75mm guns combined with sloped armour just makes me ask some things. :o)