Calm Terror is right these are 2 different vehicles.ARV is based on Merkava3 and the APC is based on Merkava mk.1 because now IDF wants to take first Merkavas off servise.
I'm not in the army but I have a lot of friends who are fighting for their motherland in Gaza now. Also I study near an army base and every day see all the variety of our weapons.
Your Negev looks very good! What's about Negev with bipods it's more common in TZAHAL.
One more thing. Your m113 is too high, it's real hight is only 2m!