Buy Speed 5 - or go for the Pro?

Need to replace my aging but well-loved Endorphin Speed 3s, and was about to buy a pair of Speed 5, but…

With sales in UK, the Endorphin Pro 4 is now similar in price to the ES5 (£130 vs £140ish)… so might it be worth the upgrade to EP4, or is the Speed 5 all the shoe I need? Not run in carbon shoes before.

Would mainly be for intervals, which for me is about 7min/mile (4:30min/km).

May use for half in new year too if I really like them (have run recent halfs and marathon last yr in SB1/SB2).

I’m 75kg & 6ft, currently running c30k a week. Have SB2 and Triumph 21 for long and easy, but find them a bit much for intervals. (Local running shop only had Speed 4 in my size and I didn’t like tight toebox.). TIA