I believe you dont mixed them and that they are still both in use. Have to check on my spanish Soldier Raids magazines for that a special issue came out at the end of last years about Infanteria de Mariña
Well, nowadays this vest is too extended between different land troops, but at the beginning it used to be worn by GOE units. There is a similar vest with a different color and pouches for Navy, I think that vest it's the third picture in your post.
Fenixspook it's right. I gave a look at all my spanish Soldiers Raids from last 2 years and all pics show that type of vest in use with all kind of units (i.e. armoured infantry, infantry, engeniers, marines, etc.) so it could be that your 1st modell is actually the 2nd modell. In other hand i couldn't find any pic reference with the vest in your last pic
For sure the 3rd picture I have was worn by Marines. At least initially. I have pictures of them on parade in this type, which is obviously different from the one in the 4th picture.
At the moment I am considering the 3rd picture to be Navy/Marines, the 4th picture to be Army (GOE to start, but probably others now). No 1st or 2nd model designation since they apparently were both produced for different users.