Dupro vs dutchbaby

hello mommies, nak minta pendapat.. susu mna yg sya perlu teruskan.. baby nk masuk 4 bulan. fully susu formula. sblm ni minum dutchbaby, skrng dupro.. semasa baby minum dutchbaby, dia jadi berkahak. tukar dupro, kahak kurang, tpi timbul bintik merah, tpi pandai hilang. susu mna yg bagus?