attachements: I did not have any in enpass however safeincloud is limited to 150KB per file
others: I am not sure I had any custom fields in enpass either as well as totp
I migrated to enpass v5 from Keepass but once I test properly android and iOS I will move to safeincloud especially that it supports family plans and with few people in my family we will have nice password manager for 1 time pay - unless devs of safeincloud do what devs of enpass did ;-(