I'm about to switch my lab rat back to cjc/ipa from tesa/ipa. 250mcg Cjc/ipa treated it well, no major water retention, good sleep, good recovery etc. Doing 1mg tesa/300mcg ipa has brought water retention, sore knees and random sleep issues. Not a huge fan of tesa personally. Plus cjc/ipa is typically cheaper.
So if cjc/ipa is working I'd say no need to switch to tesa.