It looks way too similar,same shape,color...My reasoning is that Boruto killed Momoshiki with a Giant Rasengan(which he holds in his hand)that is why he got Kāma on his palm and Jigen killing another Ōtsutsuki clan member with a fire technique or any jutsu that comes out of his mouth would result in him getting it on his chin.As to what it is capable of is beyond me...