2017 Vs 2018 DAT destroyer/Math Destroyer

Hello, I have the option to buy the Combo for $75 for the 2017 version. The 2018 Version online is $200. Money is not a huge issue, but is their a large/worthwhile difference between the two. I plan to supplement these regardless with Bootcamp and other pivotal resources. Also if your name is Kyle you are forbidden from replying to this.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums