Hm honestly the page you linked doesn't give much information. There are some obscure ratings and lots of empty entries. Just browsing through CMC gives you more data probably.
Looking at defillama.com data, Solana is consolidating right now. They had a massive growth last year and now need to re-orient a bit.
Terra is still moving upwards, but this seems mostly driven by their LUNA/UST swapping mechanism which increases scarcity on LUNA when UST is created. The question is, whether this system is sustainable in the long run or whether dangerous situation can arise where at some point a downwards spiral can be created where UST is destroyed for new LUNA and those are sold at the market for new UST.
Its ideas, its opinions and nothing more. If you love one over the other then you should pick that one. The main idea is that they are not really that much different from each other and that's true. There is no clear indication of which one is better and bigger, you just need to make sure that you know what you are getting into. You could very well not invest in either, I am not for example because I used to own SOL and sold it after it turned out to be a centralized project, and never cared for Terra.
However, if you are thorn between these two, check them both out and you will see that they are basically the same thing and do not have too much difference.