Prestashop multishop speed issue -- 2

NOTE: Please bid only if you have experience with Prestahop's multishop. Please bid your final budget! Thanks.

Hello,

I'm using multishop in Presta 1.7.8.7 (SHOP1 and SHOP2). Same admin and same DB.

SHOP1 is approximately 2x slower than SHOP2.

For example:

SHOP1: https://e-pood.kalaportaal.ee/kummilandid-silikoonid/perch-professor-fapping-craw
SHOP2: https://www.pro-fishing.eu/soft-baits/perch-professor-fapping-craw

Same settings in both shops, all Presta's native performance settings (CCC) are enabled.

Also using Prestaspeed module, same settings.

Same settings in Nginx.

Only approx 70 products less in SHOP2

A couple of different modules (I can tell which ones) are used in SHOP1 / SHOP2 but enabling/ disabling them does not change the situation much.

Would like to:

1) find out what is causing the loading speed difference in SHOP1/ SHOP2
2) have the same speed in SHOP1 as in SHOP2

Thank you!