The two novels are based in the past when women were not considered as equal to men. The characters Jane and Tess are both women and so they are subject to discrimination and they both have a lot in common, for example both Tess and Jane are considerate and caring.
Jane Eyre's background is a sad one, at the beginning of the novel she's an orphan and living with her cruel aunt and cousins who continually persecute her. This prepares her for any future injustices targeted against her.
Tess' childhood is spent amongst a loving family and this is the reason why she is so inexperienced, which leads to tragedy in her life. Jane had faced hardships which made her more enduring, but unfortunately for Tess, she had no such experiences . Jane, having a good education was cleverer than Tess, who was poor and less educated and less intellectual. This shows the value of money in the past and its advantages and this money made people more greedy and discriminating. This is moreover proven in Tess' case as she is always in trouble due to lack of money and also by Jane's reduced state when she had no money after she fled Thornfield Hall. The advantage of money is with Jane and she too is the one who is happy in the end.
The natures of Jane and Tess are very similar. They are both caring, emotional, forgiving, loyal, self-less, brave, reliable, clever, somewhat diffident, proud, a little pessimistic, they both learn from experience and they have an inferiority complex. They both try to bottle up their feelings and try to hide from reality. And they are very determined.
The fact that they are caring is shown when Jane helps Mr. Rochester (who is a stranger to her at the time) when he falls from his horse, the reason for this