You have an option of filing two different trademarks, one for the logo and another for the word, which means your brand name. But, in case you want to file only one trademark, then you must think of the differentiator for your brand. Trademarks must be taken for a symbol that differentiates your brand. If you think the brand is more attractive than your logo and there is a need to protect your name, then you can go for a word trademark. But, if you wish to protect your logo, then you need to go for a design trademark.