Austria here. Relatively high corporate taxes (25% on corporate profits, then 27% on distributed profits to shareholders if I remember correctly), and it's hard to give employees shares. The latter they are trying to fix now by adding a new company type called a FlexCorp which essentially works like a GmbH, but you can give out up to 25% of non-voting shares to employees in a simplified process. I don't know how attractive that is, it sounds dumb to me because I don't understand why they can't be normal shares and your company will be named Example FlexCorp instead if Example GmbH. (Doesn't sound shady at all.)
On the funding side, we have the Austria Wirtschaftsfond, which provides angel-level funding on some level, but the amounts are relatively low and there are restrictions what the money can be spent on. (E.g. only employees, which shareholder-CEOs are not in all circumstances, etc.) Basically, it's tricky and a jungle to navigate. I have never done a US startup, but from what I saw it seemed less intricate.
On the flipside, my wife and I have a GmbH and since we got over the initial unknowns, it seem relatively straight forward to actually run the company on a day-to-day basis, provided one actually makes money.