Which will push more???

Looking at either a komatsu 61ex15 or a cat 963 trackloader. Use would be building grassback terraces and repairing terraces in farm fields. Pushing trees to pile and piling them up after hoe has knocked them over. Also hogging dirt filling in ditches and such after land clearing. 963 has a 4in 1 bucket and rippers, d61 has 6 way blade. Advantages to loader i can see are would be able to stack trees alot higher than dozer. able to clear along with hoe if needed be. would be able to scoop dirt out of terrace channels and carry it back up the hill easier. Also when pushing dirt up backside of terrace sometimes its hard to unload your blade because your on such a up incline where with loader could just dump it. Advantages to dozer would be wider blade(10' compared to 8') Wider pads(24" compared to 22") easier grading and finish work. Ability to angle and tilt blade. Dozer has a little wider stance(only about 4 inches) Dozer has more aggressive pads(single grouser compared to double). Which one will push harder? dozer or loader? Dozer is about 10 more hp but around 10000 less weight. Have no need to load trucks FYI. Any insight into which on will work better? Having a hard time making up my mind and also never running a trackloader before. ANy help is appreciated thanks

Which will push more???