My '17 BRZ stock feels faster than my '13 FR-S OFT Stage 2 UEL 93 map,
probably all due to the revised final drive.
They did a really good job with the Kouki addressing majority of the Zenki complaints.
But personally I don't think an OFT Stage 1 tune is going make a noticeable difference over stock, a well done handcrafted tune will though.
