1.Which one is more secure when it comes to connecting to PC (i don't plan to use smartphones)?
2.What will happen if I have etc. Trezor and it get broken/lost/malfunctioned-can I still retrieve coins if that happens?
3.Can I get hacked if I connect them to infected PC or PC with bad Antivirus protection?
4.If either company (Trezor/Ledger) goes broke,what will happen with support and will i still be able to use them?
5.I prefer to be more safe once I'm connected to PC and I have less worries that someone will steal physical device,which one would you recommend then?
6.Which one has larger capacity for storing more coins?
7Which one is more future proof in long terms?
1. I think that they're both offer kinda same safety.
2. If something like that happens with the device and you don't want to buy another one, you can easily enter the seed into a software wallet (eg Electrum) and use the funds. The seed is the part you have to keep safe, maybe even in multiple places.
3. Not all viruses/malware "know" what to do. On a compromised computer the biggest problem may be a compromised wallet software (which you have to use together with the hardware wallet). But if you are not careful, you can download yourself a compromised wallet and the antivirus may not complain about it.
4. If they go down, the official support will also go down. But there's a large community of users here on bitcointalk and also on reddit and you may get help from the community. Keep in mind that the seed is more important than the hardware wallet.
5. I think that both are similar vs PC and I think that both have problems if somebody else gets physical access to them.
6. I don't know. It may be Nano X, but I don't know for sure.
I recommend you read
[GUIDE] How to buy a Hardware Wallet the right way