Very clear information.
If I import from TW to MM, still, I can see my crypto in TW? Because, as I am newbie, if I can't find my cryptos in MM or i am not able to use it, can I switch back to TW? Will my cryptos be there in TW also? Are they are in SYNC TW and MM, if I buy or sell in one wallet, it reflects in other wallet also, as recovery phrase will be same for both?
Yes you can see your crypto on Metamask . if your Metamask not detect your token simply manually imput your token by adding Import Token -> Custom Token and add fill all information needed it will detect automatically how many coin or token you had. yes if using the same wallet that having the same address.