Yeah VAT and international shipping stuff could make that a little restrictive for you. In that case, go with whatever is cheaper for you after all of that. They're both essentially the same monitor, except the Dell doesn't overclock to 165hz. For reference, my 165hz bmiprz has not yet utilized that 165hz with G-Sync, but I also don't have a crazy i9 or anything or SLI.
But I would watch the Dell- it does go on sale quite often.