Andrew is to be congratulated for his entrepreneurial verve.

...as well as the remarkable products he has been delivering lately, even though Hayaltd is but a small business. He's certainly not risk-averse.
The Centurion looks pretty damn good, and also has the potential to morph into several variants, according to the Youtube piece. I'm guessing it's an airsoft model, with the same IR gaming capability as the latest Heng Long models; but comes with a Clark board. I wonder whether barrel variations will affect the 'fighting format'; are they
ALL BB- capable, for example, or do some offer only barrel recoil and smoke? That's not clear yet.
If I had the money, I'd probably spend it on heating- given that Winter is looming up here in the Highlands, and I wouldn't look great as a geriatric icicle; but, if I cash to fritter, I'd probably still go for the Tamiya.

It has such clean lines, and small-scale engineering to savour.
Still, the Haya model is probably half the price, and looks like it could perform well. However, despite the inbuilt 'honeycomb' reinforcement in the hull floor- it appears the shell might flex more than I would like, (probably more than the Tamiya) and I find that slightly off-putting.

"Get your facts first, and then you can distort them as much as you please"- Mark Twain.