I take this as meaning, SATA is crap, PCIe is great.
hah, but in all honesty, Don't take this salesman pitch. You sound like the typical salesman who's trying to sell their inferior product and they will come up with any excuse in their mind to try and justify it being better than the competitor.
Let me tell you clearly.
SATA is **** compared to PCIe. It is ****.
It is inferior. It is worse.
That is why Apple adopted it and threw the SATA idea in the trash compactor. That is also why PCIe feels so much faster in day to day use with every task peformed. That is also why the benchmarks are more than triple that of an SATA SSD.
Recommending people to destroy their brand new machines and void their warranty is one thing, but you also think all SSDs are the same speed.
That is incomprehensibly ludicrous.