Wrong, it is a huge difference. It is £7.5k which if you are renting could be another 12 months of saving.
12 months of saving on top of the X number of years already spent saving, you are in OPs situation and priced out of where you want to live.
Stop undermining peoples hard work because you haven't experienced it.
But you wont be renting. That's the point.
I'm not saying that it's easy to save up when you're renting. I'm saying that it's easier to save when you're not renting and paying your own mortgage instead.
Considering price rises, you're likely to be better off in the long run to pay more stamp duty but buy the house you want sooner because you've been able to save more by buying a cheaper house first and not having to pay rent.