I’m fairly new to crypto and many are promoting the various ERC-20 tokens out there
My question are they all using the same tech and if they are the same just different companies what new innovations do they bring?
Surely in this case people are just buying into the business plan of the company behind it, I.e Beam or Render and how they use this same tech?
Yes, they are. They're all using ERC20 for tokenization purposes. But, they were utilizing ERC20 tokens for various purposes. These include governance, staking, and more. Some companies were innovating. But, many just imitated each other.
In the case of Beam and Render, they were using different tech. Render used ERC20 for their token. Beam is building in their own blockchain. They were not using the same tech.