MELBOURNE, Australia - Williams F1 driver Valtteri Bottas says he is enjoying working with his new team mate Felipe Massa.In 2013, the Finn made his debut with Williams alongside the often bad-tempered Pastor Maldonado, who has now switched to Lotus.Maldonado left Williams with his PDVSA (Venezuelan company) millions in a highly-critical mood but Williams is now regarded as a dark horse for the 2014 title while Lotus is struggling to get its car to work.Maldonado said: "From an aerodynamic point of view the car is very similar to that of 2013. It's the (Mercedes) engine making the difference."NO REGRETS Maldonado insists he has no regrets about joining Lotus. Williams driver Bottas indicated he too was happy with the move. Bottas said: "I believe the 2014 season is an opportunity for me to learn a little bit more than in 2013. The team has a more experienced guy (Massa) and he is quite different (to Maldonado) a little more open and more willing to be more of a team player and to provide more information."Bottas added that the openness being shown by Massa was what a team needed. "I think if you are sharing information in team meetings and try to contribute to performance and provide the best possible feedback, it always helps."After a particularly bad 2013, Williams is emerging as a surprise force in 2014, with Mercedes' Lewis Hamilton even nominating the team as his pick for the title.Ferrari's Fernando Alonso said he didn't believe Red Bull could be written off, despite the reigning champion team struggling with the new Renault 'power unit'. "In the past we saw it many times, Red Bull was behind but in the end its cars were usually the fastest."I think in two races they can be back at the top."