I would say denomination (sects of christianity) but it is imperative to read the doctrines of both churches and see if they aligned with biblical standards & principles.
Not every church out there is sound. Pray, use discernment and ask the Holy Spirit to lead you to a bible teaching church if this is your situation.
Otherwise, I am not too keen on the individual denominations themselves and as to what they profess as truth and how they are different, maybe someone else can help.