Two similarities between samples #1 and #4 are K-feldspar and quartz minerals. Another similarity is that they both have larger crystals. Two differences are #1 is Igneous and #2 is Metamorphic. Another difference is that #4 has biotite added to the minerals
Quartz is the term for another common mineral found in igneous and metamorphic rocks. Also, another two similarities would be that they both contain K feldspar and two differences is that #1 is igneous and #4 is metamorphic
So, Both samples have larger crystals, which indicates that they cooled slowly enough for the minerals to form large, visible grains. This suggests that they are both plutonic (intrusive) igneous rocks or metamorphic rocks that formed from plutonic igneous rocks.