Difference Between Casio Fx-991es Plus And Fx-570es Plus?

Hi, someone can tell me what's the difference between these two models?
FX-991ES Plus (the same of FX-115 Plus right?) http://www.casio-eur...al/fx991esplus/
FX-570ES Plus http://www.casio-eur...al/fx570esplus/
Which do you reccomend to me?
Thanks and sorry for my bad english, i'm italian

EDIT: maybe the difference is only the alimentation? see here http://edu.casio.com...spec/adves_ntd/ ... waiting your response

Edited by capac, 25 June 2012 - 06:37 PM.

Hi Capac and welcome to UCF!

If you have not already done so, you should introduce yourself here: http://www.casiocalc...?showtopic=5677



Hmm... It seems that there is no difference? Is one cheaper than the other? Maybe one just looks "cooler"? Or maybe (and most likely) the boards are different, and one may have inferior hardware to the other. All of these are just guesses, as I do not own any.

Hi Capac and welcome to UCF!

If you have not already done so, you should introduce yourself here: http://www.casiocalc...?showtopic=5677



Hmm... It seems that there is no difference? Is one cheaper than the other? Maybe one just looks "cooler"? Or maybe (and most likely) the boards are different, and one may have inferior hardware to the other. All of these are just guesses, as I do not own any.

991 is cheaper of 2€ but i don't know why...

Maybe 991 does have inferior hardware...

Two-way power.

Two-way power.

only that changes?

Edited by capac, 25 June 2012 - 08:00 PM.

what's 2-way power?

Just compare their screen shots here and here.

And get the manual here: http://support.casio...5&cid=004001126

fx-991 can use solar power in addition to its button battery LR-44, while 570 only uses an AAA battery. Their battery lifetime can't be compared, they're both great anyway.

Approximate Battery Life:

fx-570ES PLUS: 17,000 hours (continuous display of flashing cursor)

fx-991ES PLUS: 3 years (based on one hour operation per day)

And 991 is about 2 millimeters smaller in height and 5 grams lighter.

Just compare their screen shots here and here.

And get the manual here: http://support.casio...5&cid=004001126

fx-991 can use solar power in addition to its button battery LR-44, while 570 only uses an AAA battery. Their battery lifetime can't be compared, they're both great anyway.



And 991 is about 2 millimeters smaller in height and 5 grams lighter.

A OK I get it

fx-570es plus has abillity to transpose matrix and fx-991es plus cannot do that.

I read in specification.