Are all CPU cores roughly equivalent across Linode sizes?

If I were looking to maximise CPU assuming a load balanced app and ignoring other resources such as RAM etc given the current Linode pricing it seems far more economical to scale horizontally than vertically, e.g:

Linode 8GB 4 Core $40 = $10 /core
Linode 16GB 6 Core $80 = $13 /core
Linode 32GB 8 Core $160 = $20 /core

Is this assumption correct? Or, do larger Linode sizes have better processors or some other consideration I'm overlooking?

I did notice that in one of my 16GB Linodes I have:
Intel(R) Xeon(R) CPU E5-2697 v4 @ 2.30GHz

Compared to this in my 8GB's:
Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz

So newer version in the 16GB but slower clock speed - not sure if that works out roughly equiv or not, I'm assuming so.