Besides the oil aspect are these 2 engines the same?

 

Nope.

2017 has a single counter balancer.
2018 has duel counter balancers.

Different engine cases. Won't be long before the Touring line gets a new frame and a solid mounted engine with duel counter balancers. In ten years, early M8 adopters with single counter balancers will be dissing duel counter balancer guys as posers and p*ssies because they couldn't "deal" with the remaining 25% vibration.

 

I plan to buy one. So I hope the new oil system is not an issue. They went through some growing pains with oil pumps in 2017. The latest version seems to be fine