Related על תמורה 32:3

2:8 There are certain differences in the treatment of dedicated items and the second tithe. Dedicated items can be deconsecrated by anything whereas the second tithe can only be deconsecrated using coins. Moreover, while dedicated items cannot change their level of sanctity, the second tithe's sanctity level can increase after consecration. Dedicated items can be brought in and taken out of Jerusalem, but once the second tithe enters Jerusalem, it can't be brought out. None of these stringencies apply to dedicated items....

There is a stringency in consecrated items that there is not in second tithe, and in second tithe that there is not in consecrated items. Consecrated items may all be exchanged for one another, [but] second tithe may only be exchanged for money. Consecrated items do not change their level of sanctity, [but] second tithe's sanctity can increase after consecration (see Lieberman). Consecrated items are brought into Jerusalem and taken out of Jerusalem, [but] second tithe is brought into Jerusalem but is not taken out of Jerusalem. The stringency with second tithe over consecrated items is that second-tithe may acquire jars of wine (Maaser Sheni 1:3), but its money is forbidden, a doubtful admixture of any quantity is forbidden, and one is required to add a fifth (see Maaser Sheni 4:3), and is required to make a confession (Maaser Sheni 5:10), and it is forbidden to mourners (Maaser Sheni 5:12), and one is only permitted to eat it if it has been redeemed (Maaser Sheni 3:6), and one may not use it to kindle a candle, which is not the case with consecrated items. The stringency with consecrated items is that consecration takes effect on all items, and one is prohibited to derive personal benefit from it, and one is only permitted to eat it if it has been redeemed, which is not the case with second tithe.