W42 looks good but battery is little small sized for it. Pipo M8 seems to provide 6400 mAh battery. That means you lose about 1000 mAh which can be 60-75 mins. more use time. I believe the largest battery size that can get crammed in 9.4" is about 6500 mAh. Maybe even up to 6800 mAh?
A31 tablets are coming with 2 GB RAM & I expect RK3188 tablets to do the same too. Android apps run well with 1 GB RAM but having another GB for about same price is better.
+Exynos 4412 is pretty good ARM chip
-1 GB RAM
-5400 mAh battery
*lower price can always make up for any drawbacks
Pipo announced M9 RK3188 tablet. Sooner or later they will update their M8 too and put in a RK3188 into it. May take 3 or 4 months to happen though because their focus for first 3 months will be on the M9.
I think waiting for RK3188 tablet is better but each person must decide for themselves. Exynos 4412 is a great ARM chip though RK3188 is a better version of it. ie. faster CPU clock & GPU clock.
RK3188: 1.8 GHz CPU + 533 MHz MP4 GPU
Exynos 4412: 1.4 GHz CPU + 440 MHz MP4 GPU
*Note: differences with GPU are minor & CPU are moderate
Also, even though the W42 scores very well in Antutu 3 with over 15,000 points. Its Nenamark2 & Vellamo HTML5 scores do not look great. This would point to some kind of firmware, Mali driver or background app problem.
Can also see the same thing in GLBenchmark when compared to U30GT. Notice 2.1 onscreen score is somewhat lower for W42 versus U30GT.
Something is holding Exynos 4412 GPU performance back because it has better GPU specs over RK3066 and peak CPU speed, if under dual threaded mode, is not that different between them.
I assume some type of firmware/driver problem since Exynos 4412 has the better chip specs compared to RK3066.
PS, it is also possible that other tablet makers may come out with 9.4" tablets too instead of just Ramos & Pipo. Also, I would not want to buy any tablet that had a battery with size that was more than 10% smaller than the maximum that could fit in there. 5400 mAh in W42 is 18.5% smaller than 6400 mAh found in M8.
PPS, you'll be happy with W42 for the next 4-6 months at which point you will want to get a RK3188 tablet instead. =) You can always sell the W42 and get something better later on too.