> Besides size and volatily (dissolution, mergers of ETF generating unfavourable tax events), most ETF by European providers are swap-based.

The older ones are swap-based, the new ones are not. iShares has the biggest offering. Lyxor and Xtrackers are often cheaper for very popular indices. Vanguard is just entering the market.

I think it is a very healthy competition and TERs are constantly going down.