Your engine will support it. Vvti can't be activated on same ecu and we've used vvti and seen its not a major difference wrt to cost. Like for vvt activation ur total budget required will be 17-20k. So if u can pay extra then get new ecu else drive with same ecu, there won't be any problem.
Most of the swapped cars have stock old ecu's and they're running like a charm.