Telezoom lens for Sony E (currently aps-c, but future proof for possible upgrades)?

So I have the Tamron 17-70 F2.8 currently in use. And it’s been a great lens so far, as it manages to cover a wide variety of use cases. A bit bulky perhaps but very usable.

However there are times where I just wished I had more reach. Being able to get closer to the distant subject.

Hence, I consider buying a telezoom, to complement the Tamron 17-70.

I’ve seen:

Sony 70-200 F4 G (1599€)

Tamron 70-180 F2.8 (850€)

Sigma 70-200 F2.8 (1660€)

The additional crop on APS-C is actually quite nice in this scenario for that extra reach.

Currently the Tamron is half the price of the others (and less than 1/3 than the Sony 70-200 F2.8 GM).

So I am thinking, are the other lenses 2x better, so it would justify the price? Are there any sacrifices when choosing the Tamron (apart from that -20mm)? What do you guys recommend I’d take? Are there any other lenses I should consider?

What I love about the Sigma is the internal zoom, which is quite unique among these lenses at that price point. So if there’s a comparable lens out there, please let me know.