My suggestion would be to listen to only the new ones for a whole week so that your brain can burn in to the new sound. After that if you still feel them lacking, get yourself equalize APO and Peace GUI and EQ them. EQ is an amazing tool and much more effective when using parametric EQ. If you think the new headphones sound good but just lack some bass you can add a 2-4 db low shelf filter at 105-200 hz and that might really get you where you want to go.

https://github.com/jaakkopasanen/AutoEq/tree/master/results/rtings/rtings_harman_in-ear_2019v2/EPOS%20GTW%20270%20Hybrid

That is the AutoEQ profile for your headphones. Interestingly it looks like it actually removes some bass but all of that is up to you. My suggestion if you like bass would be to plug in those values in Peace and then just raise the 105 hz low shelf filter up to your liking. Just make sure to add extra negative preamp if you decide to do this. You can see how much to add by clicking the visual graph of the EQ and match the number in the top right as a negative preamp offset. If you have more questions let me know.