To determinate or indeterminate? Well here are the basic differences. Often called bush varieties, determinate tomatoes will grow to an average size of 4 feet most often. Fruit sets on the terminal or top bud and they stop growing. Over roughly the next 2 weeks all fruit will ripen for harvest and the plant will die. These varieties should not be pruned or suckered as you will severely reduce yields. Occasionally they will need limited caging and are normally varieties that will grow well in containers.
Indeterminate tomatoes will continue to grow all season until frost or cold kills them. Average vine length is about 6 feet but they can reach up to 10 feet in length. They will continuously set new fruit from maturity until death. These plants often need staking or caging and pruning can help increase yields over the season. I generally sucker these plants heavily down to 1-3 vines but the advisability of this can change from garden to garden. Because of their size indeterminate tomatoes aren’t the best selection for container gardening although with a big enough container (think half barrel) good results can be had.