I am trying to improve our website performance on google page speed test. i have wordpress version of ect, I have tried using Autoptimize or LiteSpeed Cache but i find that it is not compatible or tempremental with Gallery Bank which i need to work. i also get some css issues.
You want to be very careful with cache of e-commerce pages. Just in recent months there have been a few posts here where aggressive cache of pages was causing problems.
As to your question specifically, I personally haven't used either of those.
Hi I have used both Smush and Wordpress version of tinypng https://tinypng.com/ they both helped with the page speed I also use GTmetrix for WordPress which scores the home page.