Using the image of Sideswipe standing in front of Optimus, his head comes up to the line on the red part of his abdomen... which make it a head shorter than Alt/BT Sideswipe, and the same height as Voyager TFPrime Megatron & FE Optimus.
The price will be easier for us to swallow, as it is closer to our Voyager price-point than the Americans (which is only $20, compared to our $45-50). That means we only need twice the TFPrime quality for it to be worth it (that won't be difficult), while the Americans would need it to be 4 times as good to be worth the expense of it.
In other words, if it was priced at $160 instead of $80, how many of us would buy it (because that's what the American fans would see from that pricing).