T 1 lounge is better if you want to try and have a sleep if its a long stopover, but the food selection is a lot better in T3 lounge.

I tried to get my GF in to the T1 lounge when i was silver and it was a NO, So she had to sit outside untill i got a shower and a bite to eat and it was a rush job at that, not enjoyable when your travelling with someone.