What's the difference between S17 and S17Pro?

Hey, I'm new here and trying to figure out what's up with the S17 and S17Pro. I looked at both hash boards, and the only thing I noticed is that the S17Pro has one extra notch compared to the S17. Can anyone explain how they really differ?

If you talking about s17 and s17 pro they look the same but they are not totally the same if you check carefully the circuit and some parts are not the same if you want to compare them I think these two links below are worth reading. - Antminer S17 and Antminer s17 pro List of Spare Parts. Also, both of them have unique programs if you mix them it won't work.

Thanks for your explanation, it looks like the S17 Pro spare parts kit is more complete.

Its seems that the manufactures making energy efficient Acics miners and the pro version is one step forward the power consumption of simple S17 is about 2 094 W at normal mode efficacy of the s17 is 2094/53= 39.5j per hash and efficacy of s17pro is 1975x53=37.26j per hash . for the reference i give you a link where you can find more details about their differences  https://www.bitcoinminershashrate.com/antminer-s17-vs-s17-pro/