Yes, for sure. At least to my ear, har is pronounced like the a in the English word war. Sort of an 'or" sound. här is pronounced with the a just like in the English words at or add. Robot voice does sometimes blur the sounds. The umlaut always matters. :) Tough to compare languages though, so someone else correct me if I'm wrong.
Write the two together in Google translate and play them maybe? Not that google is the go to, but easy to use. That's what I do when I hear two words that are too much alike for my ear to hear them.