Here’s the answer that you will never find anywhere because it's my hands-on experience.

Ahref lite $99 vs Semrush Pro $99

In Ahref Lite you’ll find these feature:

Number of Tracked Websites: 5

Users allowed: 1

Tracked Keywords and Update Frequency: 500 (weekly)

Pages to crawl using Site Audit (monthly): 100,000

In SEMrush Pro you’ll find these feature:

Number of Tracked Websites: 5

Users allowed: 1

Tracked Keywords and Update Frequency: 500 (Daily)

Pages to crawl using Site Audit (monthly): 10,000

Key point:

In ahref lite, you can never use more than 25 searches per day for keyword research which is pretty awful and you don’t have access to broken link features in the lite plan which is why I was needed ahref but couldn't find it in lite plan.

Semrush allows you to make 10,000 keyword research per month which is more than enough for us (SEOS) and you can have other useful information as well and they update tracked keywords on a daily basis which is very useful.

Conclusion:

I’ll go for SEMrush but it's your choice depending upon the need.