slicendice:
The answer to your question is very easy and very hard at one and the same time. The easy bit is that only by reading each offer terms & conditions will you get the answer. The hard bit is understanding the terms & conditions.
I haven't bothered studying the ING offer because I'm not interested due to ING not subscribing to the UK deposit protection scheme. Only you can decide whether you trust the Dutch/EU scheme enough.
"gotchas" to look out for in general are (1) the time limitation on the bonus (2) the bonus not applicable to existing (or former) customers (a previous ING "gotcha"), a time frame for and minimum (sometimes maximum) funding.
Perhaps most important, withdrawal or withdrawal(s) causing the bonus eligibility to fail. In particular look out for bonus being lost completely due to a withdrawal.
Try to understand the small print. Post again if you have specific issues.