Need xpath to locate 2 buttons with almost same properties for using in Selenium automation script

Both these buttons have almost similar ID (the number on the ID may change and so is not reliable)
Both have same classes
They both reside under the same parent
Except for the span nothing is different

All the UI elements of the application I am trying to locate and build events on Using Selenium are similar to the below piece...

Can anyone please suggest how I can locate these buttons preferable with xpath?

<div id="button-1749" class="x-btn x-box-item x-toolbar-item x-btn-default-toolbar-  small x-noicon x-btn-noicon x-btn-default-toolbar-small-noicon x-item-disabled x-disabled x-btn-disabled x-btn-default-toolbar-small-disabled" style="margin: 0pt; left: 1563px; top: 0px;">
 <em id="button-1749-btnWrap" class="">
 <button id="button-1749-btnEl" class="x-btn-center" autocomplete="off" role="button"    hidefocus="true" type="button" aria-disabled="true" disabled="">
 <span id="button-1749-btnInnerEl" class="x-btn-inner" style="">Delete Selected</span>
 <span id="button-1749-btnIconEl" class="x-btn-icon x-hide-display">&nbsp;</span>
 </button>
 </em>
 </div>
 <div id="button-1750" class="x-btn x-box-item x-toolbar-item x-btn-default-toolbar-small x-noicon x-btn-noicon x-btn-default-toolbar-small-noicon" style="margin: 0pt; left: 1654px; top: 0px;">
 <em id="button-1750-btnWrap" class="">
 <button id="button-1750-btnEl" class="x-btn-center" autocomplete="off" role="button"    tabindex="1" hidefocus="true" type="button">
 <span id="button-1750-btnInnerEl" class="x-btn-inner" style="">New Title</span>
 <span id="button-1750-btnIconEl" class="x-btn-icon x-hide-display">&nbsp;</span>
 </button>
 </em>
 </div>
 

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