Black is very versatile for the Grill (if that is what it’s for?) but I am not also not averse to red either. But as you have run a mini ‘friend-focus-group’ that indicated that Black is preferred, then go with feedback from your ‘ideal client’.
We would NOT recommend you launch two colors though and we recommend you avoid variation at all costs unless it is essential requirements (like size)
If you were considering RED to stand out, you’re definitely on the right thought-process though. But you do have another option, and that is to consider adding a bright/impactful box or packaging to your main image. Your BRAND and your packaging can then help the product stand out amongst a ‘seemingly’ generic page one;)