There are many threads here on the same subject. Feel free to search for those.
Upgrade offers rolled out by HDFC In recent days are not LTF, but paid. So, if you are planning on taking a card from that list, it’ll likely be a paid card from your LTF card currently.
Furthermore, both offered cards are actually downgrades compared to Regalia. However, ultimately it depends on your preferences after looking at the features of each card.