They have different gaps to fill. I class is intended to be a multi purpose frigate with limited aerial AA/AD capabilities.
Warships are far too complex to make conclusions such as "One TF-2000 makes two Î-class. Bulk system interoperability doesn't mean putting a LACM canister on the deck makes it okay. You also have to make many changes on fire control, radar subsystems and mainly at CIC (Combat Information Centre-Savaş Harekât Merkezi). This will basically make them both the same classes when DZKK requirements are concerned in the contest of anti surface warfare. This equality between one strategic and one tactical platform is a dead end. They are being build and equipped based on the requirements and the gaps in naval warfare that DZKK intends to fill.
For example, many frigates/destroyers are either equipped Phalanx, Goalkeeper or AK-630 close in weapon systems for self-defense. They have automated computers on a algorithm. But I can say that Exocet, Harpoon, Maverick, Penguin, HARM, Termit (Russian ASM) have totally different flight profiles that at the end of the day you have to tolerate one, that's a truth. This is just the self defense aspect of a naval vessel. Imagine the challenges and complexity on other areas as AAW, ASW, ASuW..etc you name it.
So discussing ship armaments and quantities like chess is as sensible as thinking of mounting an UMTAS or a mortar on Altay MBT.