It's hard to compare accuracy, but Kagi Translate provides so many knobs to tune compared to Google (formality, gender) and provides more translations... it's just a fantastic product. Maybe even more better than Google Translate than Kagi Search is than Google Search.
I've been learning German and, among other tools (dictionaries, LLMs, etc), I often use google translate for a sentence or two. I have _constantly_ been frustrated at the inability, when going from English to German, to force it to use a particular gender or formality level. I'm willing to give up at least some accuracy to get those knobs. This is an immediate switch for me.